OPENAIRE OpenAire Datacite Sygma UnpayWall Crossref Microsoft Academic Graph Europe PubMed Central PubMed Central European Union Open Data Portal National Science Review Open Access 2021-06-29 Abstract <p>Widespread soil acidification due to atmospheric acid deposition and agricultural fertilization may greatly accelerate soil carbonate dissolution and CO2 release. However, to date, few studies have addressed these processes. Here, we use meta-analysis and nationwide-survey datasets to investigate changes in soil inorganic carbon (SIC) stocks in China. We observe an overall decrease in SIC stocks in topsoil (0￢ﾀﾓ30ￂﾠcm) (11.33ￂﾠg C m￢ﾀﾓ2 yr￢ﾀﾓ1) from the 1980s to the 2010s. Total SIC stocks have decreased by ￢ﾈﾼ8.99ￂﾠￂﾱￂﾠ2.24% (1.37ￂﾠￂﾱￂﾠ0.37ￂﾠPg C). The average SIC losses across China (0.046 Pg C yr￢ﾀﾓ1) and in cropland (0.016 Pg C yr￢ﾀﾓ1) account for ￢ﾈﾼ17.6%￢ﾀﾓ24.0% of the terrestrial C sink and 57.1% of the soil organic carbon sink in cropland, respectively. Nitrogen deposition and climate change have profound influences on SIC cycling. We estimate that ￢ﾈﾼ19.12%￢ﾀﾓ19.47% of SIC stocks will be further lost by 2100. The consumption of SIC may offset a large portion of global efforts aimed at ecosystem carbon sequestration, which emphasizes the importance of achieving a better understanding of the indirect coupling mechanisms of nitrogen and carbon cycling and of effective countermeasures to minimize SIC loss.</p Carbon sequestration Cartography China Mechanics and Transport in Unsaturated Soils Carbonate Nitrogen Soil Science Organic chemistry Carbon Dynamics in Peatland Ecosystems soil inorganic carbon stocks Soil pH Environmental science Carbon sink Agricultural and Biological Sciences carbonate Engineering Soil water Soil Carbon Sequestration Biology global change Ecosystem Soil acidification Civil and Structural Engineering Soil science 2. Zero hunger Soil organic matter Soil Fertility Ecology Geography Soil Water Retention Life Sciences Cycling Forestry Carbon cycle 04 agricultural and veterinary sciences 15. Life on land Topsoil Soil carbon Chemistry Sink (geography) 13. Climate action FOS: Biological sciences Environmental Science Physical Sciences Environmental chemistry 0401 agriculture, forestry, and fisheries soil acidification Soil Carbon Dynamics and Nutrient Cycling in Ecosystems Research Article Xiaodong Song, Fei Yang, Huayong Wu, Jing Zhang, Decheng Li, Feng Liu, Yu-Guo Zhao, Jin-Ling Yang, Bing Ju, Chang Cai, Biao Huang, Huaiyu Long, Ying Lü, Yueyu Sui, Qiubing Wang, Kening Wu, Fengrong Zhang, Mingkui Zhang, Zhou Shi, Wenqi Ma, Gang Xin, Qi Zhang, Qingrui Chang, En Ci, Daoxian Yuan, Zhang Yang-zhu, Jun-Ping Bai, Jiaying Chen, Jie Chen, Yin-Jun Chen, Yun-Zhong Dong, Han Cui, Ling Li, Liming Li, Jianjun Pan, Fupeng Song, Fujun Sun, Dengfeng Wang, Tianwei Wang, Wei Xiang-hua, Hongqi Wu, Xia Zhao, Qing Zhou, Gan‐Lin Zhang, 2021-07-02 journalpaper Abstract <p>Widespread soil acidification due to atmospheric acid deposition and agricultural fertilization may greatly accelerate soil carbonate dissolution and CO2 release. However, to date, few studies have addressed these processes. Here, we use meta-analysis and nationwide-survey datasets to investigate changes in soil inorganic carbon (SIC) stocks in China. We observe an overall decrease in SIC stocks in topsoil (0￢ﾀﾓ30ￂﾠcm) (11.33ￂﾠg C m￢ﾀﾓ2 yr￢ﾀﾓ1) from the 1980s to the 2010s. Total SIC stocks have decreased by ￢ﾈﾼ8.99ￂﾠￂﾱￂﾠ2.24% (1.37ￂﾠￂﾱￂﾠ0.37ￂﾠPg C). The average SIC losses across China (0.046 Pg C yr￢ﾀﾓ1) and in cropland (0.016 Pg C yr￢ﾀﾓ1) account for ￢ﾈﾼ17.6%￢ﾀﾓ24.0% of the terrestrial C sink and 57.1% of the soil organic carbon sink in cropland, respectively. Nitrogen deposition and climate change have profound influences on SIC cycling. We estimate that ￢ﾈﾼ19.12%￢ﾀﾓ19.47% of SIC stocks will be further lost by 2100. The consumption of SIC may offset a large portion of global efforts aimed at ecosystem carbon sequestration, which emphasizes the importance of achieving a better understanding of the indirect coupling mechanisms of nitrogen and carbon cycling and of effective countermeasures to minimize SIC loss.</p Significant loss of soil inorganic carbon at the continental scale PMC8824702 https://doi.org/PMC8824702 818346